olin_piclist@embedinc.com (Olin Lathrop) wrote:
> So, I'm thinking I'll leave pads on the right board edge for such a
> "type B" DIN 41612 connector, which means two rows of 32 pins each
> on a .1" grid.

Double-check this. IIRC, the VME bus that we used to use at Apollo was
based on the Eurocard standard, and I believe that a "type B" connector
depopulated the center row of a 3-row connector, leaving two rows of 32
pins each (on 0.100" centers) with 0.200" between the two rows.

The only other comment I have about your project is that I see no need
for a separate connector and diode for a "DC" power input. There's no
problem with feeding DC through a bridge rectifier. If the power source
is negative-ground, then one of the bridge diodes is harmlessly shorted
out. If it's positive-ground, then you've got problems that even your
separate input doesn't solve. :-)

Any extra protections you were thinking of applying to the DC input for
automotive sources could just as well be included in the AC input path.

-- Dave Tweed
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